Here are excerpts from the very long Library of Congress Classification system. Visit the Library of Congress website if you would like to explore on your own.
ART: N -
N1-(9211) Visual arts
N1-58 General
N61-72 Theory. Philosophy. Aesthetics of the visual arts
N81-390 Study and teaching. Research
N400-3990 Art museums, galleries, etc.
N4390-5098 Exhibitions
N5198-5299 Private collections and collectors
N5300-7418 History
N7420-7525.8 General works
N7560-8266 Special subjects of art
N8350-8356 Art as a profession. Artists
N8510-8553 Art studios, materials, etc.
N8554-8585 Examination and conservation of works of art
N8600-8675 Economics of art
N8700-9165 Art and the state. Public art
NX1-820 Arts in general
NX1-260 General
NX280-410 Study and teaching. Research
NX411-415 Competitions
NX420-430 Exhibitions
NX440-632 History of the arts
NX650-694 Special subjects, characters, persons, religious arts, etc.
NX700-750 Patronage of the arts
NX760-770 Administration of the arts
NX775-777 Voluntarism in the arts
NX798-820 Arts centers and facilities
Architecture - NA1-9428
Drawing. Design. Illustration: NC1-1940
ND25-3416 Painting
ND25-(48) General
ND49-813 History
ND1115-1120 Study and teaching
ND1130-1156 General works
ND1288-1460 Special subjects
ND1290-1293 Human figure
ND1300-1337 Portraits
ND1340-1367 Landscape painting
ND1370-1375 Marine painting
ND1380-1383 Animals. Birds
ND1385-1388 Sports. Hunting, fishing, etc.
ND1390-1393 Still life
ND1400-1403 Flowers. Fruit. Trees
ND1410-1460 Other subjects
ND1470-1625 Technique and materials
ND1630-1662 Examination and conservation of paintings
ND1700-2495 Watercolor painting
ND2550-2733 Mural painting
ND2889-3416 Illuminating of manuscripts and books
NC1-1940 Drawing. Design. Illustration
NC1-45 General
Including collective biography
NC50-266 History of drawing
NC390-670 Study and teaching
NC673-677 Competitions
NC703-725 General works
NC730-758 Technique
NC760-825 Special subjects
NC845-915 Graphic art materials
NC930 Conservation and restoration of drawings
NC950-(996) Illustration
NC997-1003 Commercial art. Advertising art
NC1280-1284 Printed ephemera. Imagerie populaire
NC1300-1766 Pictorial humor, caricature, etc.
NC1800-1850 Posters
NC1860-1896 Greeting cards, postcards, invitations, book jackets, etc.
NC1920-1940 Copying, enlarging, and reduction of drawings
